Re: [alsa-devel] [PATCH] [PATCH] ALSA: Remove deprecated AU1X00 AC97 driver

On Sat, 06 Feb 2016 11:25:49 +0100, Lars-Peter Clausen wrote:

The AU1X00 AC97 ALSA driver was deprecated in commit 7137c6bcb7ff ("ALSA: deprecate MIPS AU1X00 AC97 driver") in favor of the newer and better ASoC driver for the same hardware. This was almost 5 years ago and this driver has not been in use in the mainline kernel since, it should be safe to remove it at this point.

Signed-off-by: Lars-Peter Clausen lars@metafoo.de

Applied, thanks.

Takashi

diff --git a/sound/mips/Kconfig b/sound/mips/Kconfig index 2153d31..4a47050 100644 --- a/sound/mips/Kconfig +++ b/sound/mips/Kconfig @@ -23,17 +23,5 @@ config SND_SGI_HAL2 help Sound support for the SGI Indy and Indigo2 Workstation.

-config SND_AU1X00

• tristate "Au1x00 AC97 Port Driver (DEPRECATED)"
• depends on MIPS_ALCHEMY
• select SND_PCM
• select SND_AC97_CODEC
• help

•  ALSA Sound driver for the Au1x00's AC97 port.
  

•  Newer drivers for ASoC are available, please do not use
  

•  this driver as it will be removed in the future.
  

endif # SND_MIPS

diff --git a/sound/mips/Makefile b/sound/mips/Makefile index 861ec0a..b977c44 100644 --- a/sound/mips/Makefile +++ b/sound/mips/Makefile @@ -2,11 +2,9 @@ # Makefile for ALSA #

-snd-au1x00-objs := au1x00.o snd-sgi-o2-objs := sgio2audio.o ad1843.o snd-sgi-hal2-objs := hal2.o

# Toplevel Module Dependency -obj-$(CONFIG_SND_AU1X00) += snd-au1x00.o obj-$(CONFIG_SND_SGI_O2) += snd-sgi-o2.o obj-$(CONFIG_SND_SGI_HAL2) += snd-sgi-hal2.o diff --git a/sound/mips/au1x00.c b/sound/mips/au1x00.c deleted file mode 100644 index 1e30e84..0000000 --- a/sound/mips/au1x00.c +++ /dev/null @@ -1,734 +0,0 @@ -/*

• • BRIEF MODULE DESCRIPTION
• • Driver for AMD Au1000 MIPS Processor, AC'97 Sound Port
• • Copyright 2004 Cooper Street Innovations Inc.
• • Author: Charles Eidsness charles@cooper-street.com
• • This program is free software; you can redistribute it and/or modify it
• • under the terms of the GNU General Public License as published by the
• • Free Software Foundation; either version 2 of the License, or (at your
• • option) any later version.
• • THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
• • WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
• • MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
• • NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
• • INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
• • NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
• • USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
• • ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
• • (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
• • THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
• • You should have received a copy of the GNU General Public License along
• • with this program; if not, write to the Free Software Foundation, Inc.,
• • 675 Mass Ave, Cambridge, MA 02139, USA.
• • History:
• • 2004-09-09 Charles Eidsness -- Original verion -- based on

• • 		  sa11xx-uda1341.c ALSA driver and the
    

• • 		  au1000.c OSS driver.
    

• • 2004-09-09 Matt Porter -- Added support for ALSA 1.0.6
• */

-#include <linux/ioport.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <sound/core.h> -#include <sound/initval.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include <sound/ac97_codec.h> -#include <asm/mach-au1x00/au1000.h> -#include <asm/mach-au1x00/au1000_dma.h>

-MODULE_AUTHOR("Charles Eidsness charles@cooper-street.com"); -MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver"); -MODULE_LICENSE("GPL"); -MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}");

-#define PLAYBACK 0 -#define CAPTURE 1 -#define AC97_SLOT_3 0x01 -#define AC97_SLOT_4 0x02 -#define AC97_SLOT_6 0x08 -#define AC97_CMD_IRQ 31 -#define READ 0 -#define WRITE 1 -#define READ_WAIT 2 -#define RW_DONE 3

-struct au1000_period -{

• u32 start;
• u32 relative_end; /*realtive to start of buffer*/
• struct au1000_period * next;

-};

-/*Au1000 AC97 Port Control Reisters*/ -struct au1000_ac97_reg {

• u32 volatile config;
• u32 volatile status;
• u32 volatile data;
• u32 volatile cmd;
• u32 volatile cntrl;

-};

-struct audio_stream {

• struct snd_pcm_substream *substream;
• int dma;
• spinlock_t dma_lock;
• struct au1000_period * buffer;
• unsigned int period_size;
• unsigned int periods;

-};

-struct snd_au1000 {

• struct snd_card *card;
• struct au1000_ac97_reg volatile *ac97_ioport;
• struct resource *ac97_res_port;
• spinlock_t ac97_lock;
• struct snd_ac97 *ac97;
• struct snd_pcm *pcm;
• struct audio_stream *stream[2]; /* playback & capture */
• int dmaid[2]; /* tx(0)/rx(1) DMA ids */

-};

-/*--------------------------- Local Functions --------------------------------*/ -static void -au1000_set_ac97_xmit_slots(struct snd_au1000 *au1000, long xmit_slots) -{

• u32 volatile ac97_config;
• spin_lock(&au1000->ac97_lock);
• ac97_config = au1000->ac97_ioport->config;
• ac97_config = ac97_config & ~AC97C_XMIT_SLOTS_MASK;
• ac97_config |= (xmit_slots << AC97C_XMIT_SLOTS_BIT);
• au1000->ac97_ioport->config = ac97_config;
• spin_unlock(&au1000->ac97_lock);

-}

-static void -au1000_set_ac97_recv_slots(struct snd_au1000 *au1000, long recv_slots) -{

• u32 volatile ac97_config;
• spin_lock(&au1000->ac97_lock);
• ac97_config = au1000->ac97_ioport->config;
• ac97_config = ac97_config & ~AC97C_RECV_SLOTS_MASK;
• ac97_config |= (recv_slots << AC97C_RECV_SLOTS_BIT);
• au1000->ac97_ioport->config = ac97_config;
• spin_unlock(&au1000->ac97_lock);

-}

-static void -au1000_release_dma_link(struct audio_stream *stream) -{

• struct au1000_period * pointer;
• struct au1000_period * pointer_next;
• stream->period_size = 0;
• stream->periods = 0;
• pointer = stream->buffer;
• if (! pointer)

• return;
  

• do {

• pointer_next = pointer->next;
  

• kfree(pointer);
  

• pointer = pointer_next;
  

• } while (pointer != stream->buffer);
• stream->buffer = NULL;

-}

-static int -au1000_setup_dma_link(struct audio_stream *stream, unsigned int period_bytes,

•       unsigned int periods)
  

-{

• struct snd_pcm_substream *substream = stream->substream;
• struct snd_pcm_runtime *runtime = substream->runtime;
• struct au1000_period *pointer;
• unsigned long dma_start;
• int i;
• dma_start = virt_to_phys(runtime->dma_area);
• if (stream->period_size == period_bytes &&

•    stream->periods == periods)
  

• return 0; /* not changed */
  

• au1000_release_dma_link(stream);
• stream->period_size = period_bytes;
• stream->periods = periods;
• stream->buffer = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
• if (! stream->buffer)

• return -ENOMEM;
  

• pointer = stream->buffer;
• for (i = 0; i < periods; i++) {

• pointer->start = (u32)(dma_start + (i * period_bytes));
  

• pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1);
  

• if (i < periods - 1) {
  

• 	pointer->next = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
  

• 	if (! pointer->next) {
  

• 		au1000_release_dma_link(stream);
  

• 		return -ENOMEM;
  

• 	}
  

• 	pointer = pointer->next;
  

• }
  

• }
• pointer->next = stream->buffer;
• return 0;

-}

-static void -au1000_dma_stop(struct audio_stream *stream) -{

• if (snd_BUG_ON(!stream->buffer))

• return;
  

• disable_dma(stream->dma);

-}

-static void -au1000_dma_start(struct audio_stream *stream) -{

• if (snd_BUG_ON(!stream->buffer))

• return;
  

• init_dma(stream->dma);
• if (get_dma_active_buffer(stream->dma) == 0) {

• clear_dma_done0(stream->dma);
  

• set_dma_addr0(stream->dma, stream->buffer->start);
  

• set_dma_count0(stream->dma, stream->period_size >> 1);
  

• set_dma_addr1(stream->dma, stream->buffer->next->start);
  

• set_dma_count1(stream->dma, stream->period_size >> 1);
  

• } else {

• clear_dma_done1(stream->dma);
  

• set_dma_addr1(stream->dma, stream->buffer->start);
  

• set_dma_count1(stream->dma, stream->period_size >> 1);
  

• set_dma_addr0(stream->dma, stream->buffer->next->start);
  

• set_dma_count0(stream->dma, stream->period_size >> 1);
  

• }
• enable_dma_buffers(stream->dma);
• start_dma(stream->dma);

-}

-static irqreturn_t -au1000_dma_interrupt(int irq, void *dev_id) -{

• struct audio_stream *stream = (struct audio_stream *) dev_id;
• struct snd_pcm_substream *substream = stream->substream;
• spin_lock(&stream->dma_lock);
• switch (get_dma_buffer_done(stream->dma)) {
• case DMA_D0:

• stream->buffer = stream->buffer->next;
  

• clear_dma_done0(stream->dma);
  

• set_dma_addr0(stream->dma, stream->buffer->next->start);
  

• set_dma_count0(stream->dma, stream->period_size >> 1);
  

• enable_dma_buffer0(stream->dma);
  

• break;
  

• case DMA_D1:

• stream->buffer = stream->buffer->next;
  

• clear_dma_done1(stream->dma);
  

• set_dma_addr1(stream->dma, stream->buffer->next->start);
  

• set_dma_count1(stream->dma, stream->period_size >> 1);
  

• enable_dma_buffer1(stream->dma);
  

• break;
  

• case (DMA_D0 | DMA_D1):

• printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma);
  

• au1000_dma_stop(stream);
  

• au1000_dma_start(stream);
  

• break;
  

• case (~DMA_D0 & ~DMA_D1):

• printk(KERN_ERR "DMA %d empty irq.\n",stream->dma);
  

• }
• spin_unlock(&stream->dma_lock);
• snd_pcm_period_elapsed(substream);
• return IRQ_HANDLED;

-}

-/*-------------------------- PCM Audio Streams -------------------------------*/

-static unsigned int rates[] = {8000, 11025, 16000, 22050}; -static struct snd_pcm_hw_constraint_list hw_constraints_rates = {

• .count = ARRAY_SIZE(rates),
• .list = rates,
• .mask = 0,

-};

-static struct snd_pcm_hardware snd_au1000_hw = -{

• .info = (SNDRV_PCM_INFO_INTERLEAVED | \

• 		SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
  

• .formats = SNDRV_PCM_FMTBIT_S16_LE,
• .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |

• 		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050),
  

• .rate_min = 8000,
• .rate_max = 22050,
• .channels_min = 1,
• .channels_max = 2,
• .buffer_bytes_max = 128*1024,
• .period_bytes_min = 32,
• .period_bytes_max = 16*1024,
• .periods_min = 8,
• .periods_max = 255,
• .fifo_size = 16,

-};

-static int -snd_au1000_playback_open(struct snd_pcm_substream *substream) -{

• struct snd_au1000 *au1000 = substream->pcm->private_data;
• au1000->stream[PLAYBACK]->substream = substream;
• au1000->stream[PLAYBACK]->buffer = NULL;
• substream->private_data = au1000->stream[PLAYBACK];
• substream->runtime->hw = snd_au1000_hw;
• return (snd_pcm_hw_constraint_list(substream->runtime, 0,

• SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
  

-}

-static int -snd_au1000_capture_open(struct snd_pcm_substream *substream) -{

• struct snd_au1000 *au1000 = substream->pcm->private_data;
• au1000->stream[CAPTURE]->substream = substream;
• au1000->stream[CAPTURE]->buffer = NULL;
• substream->private_data = au1000->stream[CAPTURE];
• substream->runtime->hw = snd_au1000_hw;
• return (snd_pcm_hw_constraint_list(substream->runtime, 0,

• SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
  

-}

-static int -snd_au1000_playback_close(struct snd_pcm_substream *substream) -{

• struct snd_au1000 *au1000 = substream->pcm->private_data;
• au1000->stream[PLAYBACK]->substream = NULL;
• return 0;

-}

-static int -snd_au1000_capture_close(struct snd_pcm_substream *substream) -{

• struct snd_au1000 *au1000 = substream->pcm->private_data;
• au1000->stream[CAPTURE]->substream = NULL;
• return 0;

-}

-static int -snd_au1000_hw_params(struct snd_pcm_substream *substream,

• 			struct snd_pcm_hw_params *hw_params)
  

-{

• struct audio_stream *stream = substream->private_data;
• int err;
• err = snd_pcm_lib_malloc_pages(substream,

• 		       params_buffer_bytes(hw_params));
  

• if (err < 0)

• return err;
  

• return au1000_setup_dma_link(stream,

• 		     params_period_bytes(hw_params),
  

• 		     params_periods(hw_params));
  

-}

-static int -snd_au1000_hw_free(struct snd_pcm_substream *substream) -{

• struct audio_stream *stream = substream->private_data;
• au1000_release_dma_link(stream);
• return snd_pcm_lib_free_pages(substream);

-}

-static int -snd_au1000_playback_prepare(struct snd_pcm_substream *substream) -{

• struct snd_au1000 *au1000 = substream->pcm->private_data;
• struct snd_pcm_runtime *runtime = substream->runtime;
• if (runtime->channels == 1)

• au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4);
  

• else

• au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
  

• snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
• return 0;

-}

-static int -snd_au1000_capture_prepare(struct snd_pcm_substream *substream) -{

• struct snd_au1000 *au1000 = substream->pcm->private_data;
• struct snd_pcm_runtime *runtime = substream->runtime;
• if (runtime->channels == 1)

• au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4);
  

• else

• au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
  

• snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
• return 0;

-}

-static int -snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd) -{

• struct audio_stream *stream = substream->private_data;
• int err = 0;
• spin_lock(&stream->dma_lock);
• switch (cmd) {
• case SNDRV_PCM_TRIGGER_START:

• au1000_dma_start(stream);
  

• break;
  

• case SNDRV_PCM_TRIGGER_STOP:

• au1000_dma_stop(stream);
  

• break;
  

• default:

• err = -EINVAL;
  

• break;
  

• }
• spin_unlock(&stream->dma_lock);
• return err;

-}

-static snd_pcm_uframes_t -snd_au1000_pointer(struct snd_pcm_substream *substream) -{

• struct audio_stream *stream = substream->private_data;
• struct snd_pcm_runtime *runtime = substream->runtime;
• long location;
• spin_lock(&stream->dma_lock);
• location = get_dma_residue(stream->dma);
• spin_unlock(&stream->dma_lock);
• location = stream->buffer->relative_end - location;
• if (location == -1)

• location = 0;
  

• return bytes_to_frames(runtime,location);

-}

-static struct snd_pcm_ops snd_card_au1000_playback_ops = {

• .open = snd_au1000_playback_open,
• .close = snd_au1000_playback_close,
• .ioctl = snd_pcm_lib_ioctl,
• .hw_params = snd_au1000_hw_params,
• .hw_free = snd_au1000_hw_free,
• .prepare = snd_au1000_playback_prepare,
• .trigger = snd_au1000_trigger,
• .pointer = snd_au1000_pointer,

-};

-static struct snd_pcm_ops snd_card_au1000_capture_ops = {

• .open = snd_au1000_capture_open,
• .close = snd_au1000_capture_close,
• .ioctl = snd_pcm_lib_ioctl,
• .hw_params = snd_au1000_hw_params,
• .hw_free = snd_au1000_hw_free,
• .prepare = snd_au1000_capture_prepare,
• .trigger = snd_au1000_trigger,
• .pointer = snd_au1000_pointer,

-};

-static int -snd_au1000_pcm_new(struct snd_au1000 *au1000) -{

• struct snd_pcm *pcm;
• int err;
• unsigned long flags;
• if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0)

• return err;
  

• snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,

• snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024);
  

• snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,

• &snd_card_au1000_playback_ops);
  

• snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,

• &snd_card_au1000_capture_ops);
  

• pcm->private_data = au1000;
• pcm->info_flags = 0;
• strcpy(pcm->name, "Au1000 AC97 PCM");
• spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock);
• spin_lock_init(&au1000->stream[CAPTURE]->dma_lock);
• flags = claim_dma_lock();
• au1000->stream[PLAYBACK]->dma = request_au1000_dma(au1000->dmaid[0],

• 	"AC97 TX", au1000_dma_interrupt, 0,
  

• 	au1000->stream[PLAYBACK]);
  

• if (au1000->stream[PLAYBACK]->dma < 0) {

• release_dma_lock(flags);
  

• return -EBUSY;
  

• }
• au1000->stream[CAPTURE]->dma = request_au1000_dma(au1000->dmaid[1],

• 	"AC97 RX", au1000_dma_interrupt, 0,
  

• 	au1000->stream[CAPTURE]);
  

• if (au1000->stream[CAPTURE]->dma < 0){

• release_dma_lock(flags);
  

• return -EBUSY;
  

• }
• /* enable DMA coherency in read/write DMA channels */
• set_dma_mode(au1000->stream[PLAYBACK]->dma,

•      get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC);
  

• set_dma_mode(au1000->stream[CAPTURE]->dma,

•      get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC);
  

• release_dma_lock(flags);
• au1000->pcm = pcm;
• return 0;

-}

-/*-------------------------- AC97 CODEC Control ------------------------------*/

-static unsigned short -snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg) -{

• struct snd_au1000 *au1000 = ac97->private_data;
• u32 volatile cmd;
• u16 volatile data;
• int i;
• spin_lock(&au1000->ac97_lock);

-/* would rather use the interrupt than this polling but it works and I can't -get the interrupt driven case to work efficiently */

• for (i = 0; i < 0x5000; i++)

• if (!(au1000->ac97_ioport->status & AC97C_CP))
  

• 	break;
  

• if (i == 0x5000)

• printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n");
  

• cmd = (u32) reg & AC97C_INDEX_MASK;
• cmd |= AC97C_READ;
• au1000->ac97_ioport->cmd = cmd;
• /* now wait for the data */
• for (i = 0; i < 0x5000; i++)

• if (!(au1000->ac97_ioport->status & AC97C_CP))
  

• 	break;
  

• if (i == 0x5000) {

• printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n");
  

• spin_unlock(&au1000->ac97_lock);
  

• return 0;
  

• }
• data = au1000->ac97_ioport->cmd & 0xffff;
• spin_unlock(&au1000->ac97_lock);
• return data;

-}

-static void -snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) -{

• struct snd_au1000 *au1000 = ac97->private_data;
• u32 cmd;
• int i;
• spin_lock(&au1000->ac97_lock);

-/* would rather use the interrupt than this polling but it works and I can't -get the interrupt driven case to work efficiently */

• for (i = 0; i < 0x5000; i++)

• if (!(au1000->ac97_ioport->status & AC97C_CP))
  

• 	break;
  

• if (i == 0x5000)

• printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n");
  

• cmd = (u32) reg & AC97C_INDEX_MASK;
• cmd &= ~AC97C_READ;
• cmd |= ((u32) val << AC97C_WD_BIT);
• au1000->ac97_ioport->cmd = cmd;
• spin_unlock(&au1000->ac97_lock);

-}

-/*------------------------------ Setup / Destroy ----------------------------*/

-static void snd_au1000_free(struct snd_card *card) -{

• struct snd_au1000 *au1000 = card->private_data;
• if (au1000->stream[PLAYBACK]) {

•  	if (au1000->stream[PLAYBACK]->dma >= 0)
  

• 	free_au1000_dma(au1000->stream[PLAYBACK]->dma);
  

• kfree(au1000->stream[PLAYBACK]);
  

• }
• if (au1000->stream[CAPTURE]) {

• if (au1000->stream[CAPTURE]->dma >= 0)
  

• 	free_au1000_dma(au1000->stream[CAPTURE]->dma);
  

• kfree(au1000->stream[CAPTURE]);
  

• }
• if (au1000->ac97_res_port) {

• /* put internal AC97 block into reset */
  

• if (au1000->ac97_ioport) {
  

• 	au1000->ac97_ioport->cntrl = AC97C_RS;
  

• 	iounmap(au1000->ac97_ioport);
  

• 	au1000->ac97_ioport = NULL;
  

• }
  

• release_and_free_resource(au1000->ac97_res_port);
  

• au1000->ac97_res_port = NULL;
  

• }

-}

-static struct snd_ac97_bus_ops ops = {

• .write = snd_au1000_ac97_write,
• .read = snd_au1000_ac97_read,

-};

-static int au1000_ac97_probe(struct platform_device *pdev) -{

• int err;
• void __iomem *io;
• struct resource *r;
• struct snd_card *card;
• struct snd_au1000 *au1000;
• struct snd_ac97_bus *pbus;
• struct snd_ac97_template ac97;
• err = snd_card_new(&pdev->dev, -1, "AC97", THIS_MODULE,

• 	   sizeof(struct snd_au1000), &card);
  

• if (err < 0)

• return err;
  

• au1000 = card->private_data;
• au1000->card = card;
• spin_lock_init(&au1000->ac97_lock);
• /* from here on let ALSA call the special freeing function */
• card->private_free = snd_au1000_free;
• /* TX DMA ID */
• r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
• if (!r) {

• err = -ENODEV;
  

• snd_printk(KERN_INFO "no TX DMA platform resource!\n");
  

• goto out;
  

• }
• au1000->dmaid[0] = r->start;
• /* RX DMA ID */
• r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
• if (!r) {

• err = -ENODEV;
  

• snd_printk(KERN_INFO "no RX DMA platform resource!\n");
  

• goto out;
  

• }
• au1000->dmaid[1] = r->start;
• au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream),

• 			   GFP_KERNEL);
  

• if (!au1000->stream[PLAYBACK]) {

• err = -ENOMEM;
  

• goto out;
  

• }
• au1000->stream[PLAYBACK]->dma = -1;
• au1000->stream[CAPTURE] = kmalloc(sizeof(struct audio_stream),

• 			  GFP_KERNEL);
  

• if (!au1000->stream[CAPTURE]) {

• err = -ENOMEM;
  

• goto out;
  

• }
• au1000->stream[CAPTURE]->dma = -1;
• r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
• if (!r) {

• err = -ENODEV;
  

• goto out;
  

• }
• err = -EBUSY;
• au1000->ac97_res_port = request_mem_region(r->start, resource_size(r),

• 				   pdev->name);
  

• if (!au1000->ac97_res_port) {

• snd_printk(KERN_ERR "ALSA AC97: can't grab AC97 port\n");
  

• goto out;
  

• }
• io = ioremap(r->start, resource_size(r));
• if (!io)

• goto out;
  

• au1000->ac97_ioport = (struct au1000_ac97_reg *)io;
• /* configure pins for AC'97
• TODO: move to board_setup.c */
• au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC);
• /* Initialise Au1000's AC'97 Control Block */
• au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE;
• udelay(10);
• au1000->ac97_ioport->cntrl = AC97C_CE;
• udelay(10);
• /* Initialise External CODEC -- cold reset */
• au1000->ac97_ioport->config = AC97C_RESET;
• udelay(10);
• au1000->ac97_ioport->config = 0x0;
• mdelay(5);
• /* Initialise AC97 middle-layer */
• err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus);
• if (err < 0)

• goto out;
  

• memset(&ac97, 0, sizeof(ac97));
• ac97.private_data = au1000;
• err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97);
• if (err < 0)

• goto out;
  

• err = snd_au1000_pcm_new(au1000);
• if (err < 0)

• goto out;
  

• strcpy(card->driver, "Au1000-AC97");
• strcpy(card->shortname, "AMD Au1000-AC97");
• sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver");
• err = snd_card_register(card);
• if (err < 0)

• goto out;
  

• printk(KERN_INFO "ALSA AC97: Driver Initialized\n");
• platform_set_drvdata(pdev, card);
• return 0;
• out:
• snd_card_free(card);
• return err;

-}

-static int au1000_ac97_remove(struct platform_device *pdev) -{

• return snd_card_free(platform_get_drvdata(pdev));

-}

-struct platform_driver au1000_ac97c_driver = {

• .driver = {

• .name	= "au1000-ac97c",
  

• .owner	= THIS_MODULE,
  

• },
• .probe = au1000_ac97_probe,
• .remove = au1000_ac97_remove,

-};

-module_platform_driver(au1000_ac97c_driver);

2.1.4